diff --git a/README b/README
index b705822c6..493b7f074 100644
--- a/README
+++ b/README
@@ -110,7 +110,7 @@ To make an APK which embeds a ZIM file:
 * In the json file, add:
     "embed_zim": true,
 * You might need to set up following env. variable:
-    _JAVA_OPTIONS="\"-Xmx4096m\" \"-Xms4096m\" \"-XX:MaxPermSize=4096m\""
+    _JAVA_OPTIONS="\"-Xmx4096m\" \"-Xms4096m\""
 
 *********************************************************************
 *************************** CONTACT *********************************
diff --git a/gradlew b/gradlew
index 737795368..3ae1da46f 100755
--- a/gradlew
+++ b/gradlew
@@ -7,7 +7,7 @@
 ##############################################################################
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS="\"-Xmx4096m\" \"-Xms4096m\" \"-XX:MaxPermSize=4096m\""
+DEFAULT_JVM_OPTS="\"-Xmx4096m\" \"-Xms4096m\""
 
 APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`